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发明名称
Dispositifs à décharge électronique
摘要
申请公布号
FR821765(A)
申请公布日期
1937.12.13
申请号
FRD821765
申请日期
1937.05.12
申请人
LE MATERIEL TELEPHONIQUE
发明人
分类号
H01J19/42
主分类号
H01J19/42
代理机构
代理人
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